2026-09-18 daily answer

Step-by-step reasoning

1. Region 1 has only one safe cell left: R1C6.
2. R1C6 rules out cells in its row, column, color region, and touching neighborhood.
3. Region 2 has only one safe cell left: R2C4.
4. R2C4 rules out cells in its row, column, color region, and touching neighborhood.
5. Region 3 has only one safe cell left: R3C1.
6. R3C1 rules out cells in its row, column, color region, and touching neighborhood.
7. Region 6 has only one safe cell left: R6C7.
8. R6C7 rules out cells in its row, column, color region, and touching neighborhood.
9. Region 4 has only one safe cell left: R4C8.
10. R4C8 rules out cells in its row, column, color region, and touching neighborhood.
11. A cat at R5C3 leaves no valid completion, so exclude it.
12. A cat at R5C5 leaves no valid completion, so exclude it.
13. Row 5 has only one safe cell left: R5C2.
14. R5C2 rules out cells in its row, column, color region, and touching neighborhood.
15. Row 7 has only one safe cell left: R7C5.
16. R7C5 rules out cells in its row, column, color region, and touching neighborhood.
17. Row 8 has only one safe cell left: R8C3.